Question
What are the similarities between lanthanoids and actinoids?
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Answer
self
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Match the items of Column I and Column II.
| Column I | Column II | ||
| (i) | Mathematical expression for rate of reaction. | (a) | Rate constant. |
| (ii) | Rate of reaction for zero order reaction is equal to. | (b) | Rate law. |
| (iii) | Units of rate constant for zero order reaction is same as that of. | (c) | Oder of slowest step. |
| (iv) | Order of a complex reaction is determined by. | (d) | Rate of a reaction. |
- When concentrated sulphuric acid was added to an unknown salt present in a test tube a brown gas (A) was evolved. This gas intensified when copper turnings were added to this test tube. On cooling, the gas (A) changed into a colourless solid (B).
- Identify (A) and (B).
- Write the structures of (A) and (B).
- Why does gas (A) change to solid on cooling?
- Arrange the following in the decreasing order of their reducing character:
- Complete the following reaction:
$(a).$ Using, Valence Bond Theory identify $A, B, C, D, E$ and $F$ in the following table:
$(b).$ Write the ionic equations for the reaction of acidified $K_2Cr_2O_7$ with
$(i) \ H_2S$ and $(ii) \ FeSO_4$
→$(b).$ Write the ionic equations for the reaction of acidified $K_2Cr_2O_7$ with
$(i) \ H_2S$ and $(ii) \ FeSO_4$
Derive the integral rate equation for the first order reaction and prove that the graph of $\ln k$ and $t$ a straight line.
→Using crystal field theory, draw energy level diagram, write the electronic configuration of the central metal atom/ion and determine the magnetic moment value in the following:
i. $\left[ CoF _6\right]^{3-},\left[ Co \left( H _2 O \right)_6\right]^{2+},\left[ Co ( CN )_6\right]^{3-}$
ii. $\left[ FeF _6\right]^{3-},\left[ Fe \left( H _2 O \right)_6\right]^{2+},\left[ Fe ( CN )_6\right]^{4-}$
→i. $\left[ CoF _6\right]^{3-},\left[ Co \left( H _2 O \right)_6\right]^{2+},\left[ Co ( CN )_6\right]^{3-}$
ii. $\left[ FeF _6\right]^{3-},\left[ Fe \left( H _2 O \right)_6\right]^{2+},\left[ Fe ( CN )_6\right]^{4-}$
How can you remove the hard calcium carbonate layer of the egg without damaging its semiprermiable membrane? Can this egg be inserted into a bottle with a narrow neck without distorting its shape? Explain the process involved.
Derive the Nernst equation and explain how $E_{\text {cell }}^{\circ}$ depends on concentration of ions.
→Explain the method of preparing haloalkanes by free radical substitution of alkanes.
- Account for the following:
- The acidic strength decreases in the order $HCl > H_2S > PH_3$.
- Tendency to form pentahalides decreases down the group in group $15$ of the periodic table.
- Complete the following chemical equations:
- $P_4+ SO_2Cl_2 \rightarrow $
- $XeF_2 + H_2O\rightarrow $
- $I_2 + HNO_3 \rightarrow $
Attempt any five of the following:
$(a)$ What are Purines and Pyrimidines? Name the purines and Pyrimidines present in $ \text{DNA}$ and $ \text{RNA}$ nucleic Acids.
$(b)$ Write the full forms of $ \text{DNA}$ and $ \text{RNA}$
$(c)$ Name the vitamin whose deficiency causes convulsions.
$(d)$ Which vitamin $B$ group can be stored in our body?
$(e) (i).$ What is the difference between a nucleoside and nucleotide?
$(ii).$ Write one difference between $a-$helix and $\beta-$pleated sheet structures of protein.
$(f)$ What are nucleic acids? Why two strands in $ \text{DNA}$ are not identical but are complementary?
$(g)$ Some enzymes are named after the reaction, where they are used. What name is given to the class of enzymes which catalyse the oxidation of one substrate with simultaneous reduction of another substrate?
→$(a)$ What are Purines and Pyrimidines? Name the purines and Pyrimidines present in $ \text{DNA}$ and $ \text{RNA}$ nucleic Acids.
$(b)$ Write the full forms of $ \text{DNA}$ and $ \text{RNA}$
$(c)$ Name the vitamin whose deficiency causes convulsions.
$(d)$ Which vitamin $B$ group can be stored in our body?
$(e) (i).$ What is the difference between a nucleoside and nucleotide?
$(ii).$ Write one difference between $a-$helix and $\beta-$pleated sheet structures of protein.
$(f)$ What are nucleic acids? Why two strands in $ \text{DNA}$ are not identical but are complementary?
$(g)$ Some enzymes are named after the reaction, where they are used. What name is given to the class of enzymes which catalyse the oxidation of one substrate with simultaneous reduction of another substrate?